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3 years ago

The altitude of the triangle ABC, segment DA, has been

Mathematics

2 answers:

slavikrds [6]3 years ago

3 0

Answer: sin(B)= h/c

h= csin(b)

Area= 1/2acsin(B)

Step-by-step explanation: i got the answers frfr on edge smh yall know how that is

kirza4 [7]3 years ago

3 0

Answer:

Step-by-step explanation:

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At the beginning of an environmental study, a forest covered an area of 1500km^2. Since then, the area has decreased by 6.3% eac

geniusboy [140]

The correct answer is:

$y=1500(0.937)^t$

Explanation:

An exponential function is of the form

$y=a\times b^x$ , where a is the initial population, b is 1 plus the amount of yearly change, and x is the number of years.

For our problem, a, the initial population, is 1500.

The yearly change is 6.3%; 6.3% = 6.3/100 = 0.063. Since it is decreasing, this is negative; 1+(-0.063) = 0.937.

We use t as the number of years.

This gives us

$y=1500(0.937)^t$

3 0

3 years ago

The table lists students in an international summer school and the countries they come from.

ruslelena [56]

Answer: No

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Identify the perimeter and area of a square with diagonal length 11in. Give your answer in simplest radical form. HELP PLEASE!!

Nataliya [291]

Answer:

Perimeter = 22*sqrt(2)
Area = 60.5 inches
D

Step-by-step explanation:

Remark

You need 2 facts.

A square has 4 equal sides.
It contains (by definition) 1 right angle but since we are not including and statement about parallel sides, it needs 4 right angles.

That means you can use the Pythagorean Theorem.

If one side of a square is a then the 1 after it is a as well.

Formula

a^2 + a^2 = c^2
2a^2 = c^2

Givens

c = 11

Solution

2a^2 = 11^2
2a^2 = 121 Divide by 2
a^2 = 121/2 Take the square root of both sides
sqrt(a^2) = sqr(121/2)
a = 11/sqrt(2) Rationalize the denominator
a = 11 * sqrt(2)/[sqrt(2) * sqrt(2)]
a = 11 * sqrt(2) / 2

Perimeter

P = 4s

P = 4*11*sqrt(2)/2
P = 44*sqrt(2)/2
P = 22*sqrt(2)

You don't need the area. The answer is D

Area

Area = s^2
Area = (11*sqrt(2)/2 ) ^2
Area = 121 * 2 / 4
Area = 60.5

8 0

3 years ago

Part A: Joel uses the incorrect expression 0.95(190)(0.8) to calculate that the computer will cost him a total of $144.40. Descr

notka56 [123]

Answer:

Part A) The correct Expression : (1.05)(190)(0.8)

=> The error of Joel was that instead of adding the sales tax, he subtracted it.

Part B) $159.60

Step-by-step explanation:

Part A:

To calculate the computer cost, we need to find out the selling price first.

There's a discount of 20% so the selling price will be 100% - 20% = 80% =>80/100 = 0.8

So, We'll multiply the cost price by 0.8

=> (190)(0.8)

But, there is a sales tax of 5%

So, the selling price with cost price will be:

=> 100% + 5% = 105% => 105/100 = 1.05 (We'll multiply this too with the first equation that we made above)

So, the expression will be:

=> (1.05)(190)(0.8)

The error of Joel was that instead of adding the sales tax, he subtracted it.

Part B)

Joel will pay for the tablet:

=> (1.05)(190)(0.8) [We used the above expression]

=> $159.60

6 0

3 years ago

Suppose the amounts of M&M's a machine dispenses into packages has a normal distribution with a mean of 25 M&M's and a s

emmainna [20.7K]

Answer:

16%

Step-by-step explanation:

The mean is 25, and the standard deviation is 1.

26 is 1 standard deviation above the mean.

According to the empirical rule, 68% of the population is between -1 and +1 standard deviations. That means that 32% is less than -1 or greater than +1 standard deviations. So half of that, or 16%, is greater than +1 standard deviations.

5 0

3 years ago